Grove – 4 pin Female Jumper to Grove 4 pin Conversion Cable (5 PCs per Pack) $4.95 4 Pin jumper wire for easy Grove-to-Arduino connections.
	Infrared LED Emitter $0.50 Standard sized T1-3/4 infrared emitting LED.
	Raspberry Pi Relay Board v1.0 $29.40 The Relay Shield contains four high quality relays and provides NO/NC connections to control high current loads.
	Grove – Barometer Sensor(BMP180) $16.75 This Grove module is a Bosch BMP180 high-precision, low-power digital barometer.
	Alligator Test Leads – Multicolored (10 Pack) $3.90 Alligator clips are likely to be the most useful thing on your workbench besides the workbench itself.